Recent Examples of fission from the Web
Nuclear reactors produce ample amounts of high-energy neutrons as a byproduct of fission reactions.
Its number of operating centrifuges -- the fast-spinning machines that separate the uranium-235 isotopes used in fission -- was below the limit of 5,060 set by the accord.
According to North Korea, the latest test was an advanced weapon design—a true two-stage (fission triggering fusion) thermonuclear weapon (a hydrogen bomb) with adjustable yield.
The weapons-grade uranium, riddled with radioactive byproducts of fission, was awaiting transfer by armed escort to Accra airport.
Like nuclear fission itself, our most likely path to nuclear war is an unstoppable chain reaction set off by the president with the push of a button.
North Korea claimed the device tested Sunday was a hydrogen bomb, a much more powerful type of nuclear weapon that uses fusion instead of fission to increase the blast yield, or destructive power.
Atomic weapons like those previously tested by North Korea rely on nuclear fission to release energy — basically splitting atoms.
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FISSION Defined for English Language Learners
FISSION Defined for Kids
medical Definition of fission
fissionverb fissioned; fissioning \ˈfish-(ə-)niŋ also ˈfizh-\
fissional\ˈfish-ən-ᵊl also ˈfizh-\ adjective
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